Serena Williams confirmed her pregnancy in April after the 35-year-old inadvertently revealed on Snapchat that she was 20 weeks along. Williams and Ohanian, 34, were engaged in December.

Ahead of their daughter’s birth, the couple revealed that they were opting to leave the baby’s sex a surprise, though both shared that they felt they were having a girl.

“[Serena] won the Australian Open while pregnant. And she remarked that she feels like it has to be a girl because everything that that baby went through and handled like a champ, only a woman could be strong enough to take on,” Ohanian said during a late-night talk show appearance in early August.

The pro athlete echoed her fiancé’s sentiment to Vogue in its September issue, revealing, “I have a strong suspicion that it’s a girl.”
– Alexia Fernandez I PEOPLE.com